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Big time Carbon Monoxide Scare and our Peerless boiler
Hi, Stumbled across this site, trying to figure out what went wrong for us this weekend.
I'm a new homeowner & not savvy yet in all the things you guys are.
We moved in this summmer, have baseboard heating and got our Peerless boiler tuned up about a month ago. (Boiler is from 2010). Was told everything was fine. Then we had to relight the pilot a few times as it was going out. Late Saturday night we relit it and went to sleep. 10-25 minutes after relighting it, carbon monoxide detectors went off. We opened door to boiler room to see what was up and boiler seemed to be overheating. It was very hot in there, smelly and boiler was rumbling like crazy. We turned it off and called 911. Fire department arrived almost instantly and said our CO levels were 600 ppm.
We called back the plumber who did the boiler tune up and he said he could find only one issue- safety was missing between two little wires hanging off the front of the boiler (I forget the name of that safety), and he replaced it- but he said that still didn't explain why we got the CO levels we did. He checked exhaust by watching a flame get sucked into it & said that didn't seem to be a problem. He got it running again and said we should be "fine for a while."
Since he said that the issue he fixed didn't fully explain what went wrong- I'm scared this could happen again.
I did find that there was a half-melted plastic bottle of "Raid Max Bug Barrier" lying under the boiler and asked if that could explain anything and he thought No.
We discussed with our contractor, architect neighbor & the prior owner of our house who is also a contractor. All had different suggestions, (bigger fresh air intake, double-walled flue, replacing something at the top of the flue bc prior owner said he got cold back draft) but everyone basically said "but that doesn't explain why you had CO flooding in."
Any suggestions/thoughts? Should I call in a different plumber? A chimney person? Some sort of engineer?
Thanks so much, and apologies for my lack of sophistication about this.